UE Transmit Antenna Selection in Dual Connectivity
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Solution Overview
Problem
In wireless communication systems, particularly in 3GPP LTE, the configuration of UE transmit antenna selection becomes complex when dual connectivity is involved, as each evolved NodeB may not be able to coordinate antenna selection in real-time, leading to challenges in determining the appropriate configuration for optimal performance.
Innovation Solution
A method and apparatus for configuring UE transmit antenna selection in dual connectivity scenarios, where the user equipment (UE) receives a configuration from the network and determines whether to apply it based on the dual connectivity configuration, allowing for clear definition of the relationship between dual connectivity and UE transmit antenna selection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UE transmit antenna selection configuration is applied in dual connectivity scenario, then communication performance is improved, but configuration complexity increases because each eNB cannot coordinate antenna selection in real-time
Solution Approach 1:
The patent segments the antenna selection configuration by defining separate configurations for Master Cell Group (MCG) and Secondary Cell Group (SCG). The UE determines whether to apply MCG-based or SCG-based antenna selection configuration based on dual connectivity status, dividing the complex coordination problem into manageable independent configurations for each cell group.
Solution Approach 2:
The patent applies preliminary action by having the network pre-configure antenna selection parameters before dual connectivity operation begins. The UE receives and stores antenna selection configurations in advance, then determines applicability based on dual connectivity status, avoiding real-time coordination complexity during actual operation.
2Device complexity
If UE determines antenna selection configuration based on dual connectivity configuration, then coordination between eNBs is simplified, but processing time increases due to additional determination steps
Solution Approach 1:
The patent implements self-service by enabling the UE to autonomously determine whether to apply MCG-based or SCG-based antenna selection configuration based on its own dual connectivity status. The UE independently evaluates the configuration applicability without requiring inter-eNB coordination or additional signaling, reducing processing time while simplifying network coordination.
Data Source
AI summary
A method and apparatus for configuring UE transmit antenna selection in a wireless communication system is provided. A user equipment (UE) receiving a configuration of UE transmit antenna selection from a network, and determines whether to apply the configuration of UE transmit antenna selection according to a configuration of dual connectivity. When the configuration of dual connectivity is not received from the network, it is determined to apply the configuration UE transmit antenna selection.